404423111 has 4 divisors (see below), whose sum is σ = 411277800. Its totient is φ = 397568424.

The previous prime is 404423087. The next prime is 404423119. The reversal of 404423111 is 111324404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404423111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404423119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3427256 + ... + 3427373.

It is an arithmetic number, because the mean of its divisors is an integer number (102819450).

Almost surely, 2^404423111 is an apocalyptic number.

404423111 is a deficient number, since it is larger than the sum of its proper divisors (6854689).

404423111 is an equidigital number, since it uses as much as digits as its factorization.

404423111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854688.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 404423111 is about 20110.2737674056. The cubic root of 404423111 is about 739.5121638613.

Adding to 404423111 its reverse (111324404), we get a palindrome (515747515).

The spelling of 404423111 in words is "four hundred four million, four hundred twenty-three thousand, one hundred eleven".